Keyhole-guard.



P. MAURO.

KEYHOLE GUARD. APPLICATION FILED JUNE 13, 1911.

Patented Oct. 10, 1911.

carrier) s'rATEs PATENT OFFICE.

FRANK MAURO, OF DENVER, COLORADO, ASSIGNOR 0F ONE-FOURTH TO FRANKSERPICO, OF DENVER, COLORADO.

KEYHOLEGUARD.

Specification of Letters Patent.

Application filed June 13, 1911.

To all whom it may concern:

Be it known that I, FRANK MAURO, a citizen of the United States,residing at Denver, in the county of Denver and State of Colorado, haveinvented certain new and useful Improvements in Keyhole-Guards; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same. 7

This invention relates to keyhole guards and has for an object toprovide an apparatus to apply to a door in combination with a common orrim lock for guarding the keyhole to prevent the insertion of a key.

A further object of the invention is to provide a guard whollyindependent from the look but attached to the door adjacent to andcovering a part of the lock with means to swing into position to inserta stud in the keyhole to prevent the introduction of a key from theopposite side.

With these and other objects in view the invention comprises certainnovel constructions, combinations and arrangement of parts as will behereinafter more fully described and claimed.

In the drawings :-Figure 1 is a perspective view of a conventional rimlock with a fragment of a door and the keyhole guard associatedtherewith. Fig. 2 is a vertical sectional view as on line 2-2 of Fig. 1.Fig. 8 is an enlarged section taken on line 2-2 showing only the lockingleaves.

Like characters of reference indicate corresponding parts throughout theseveral views.

In Fig. 1 a conventional rim lock 10 is shown attached to a fragment ofa conventional door 11. As the lock forms no part of the presentinvention which is intended to be associated with any ordinary rim look,no further description of such lock will be given.

A band 12 is employed which is attached to the door as by the employmentof screws 13 and spans the lock 10 adjacent the edge of the door butwithout necessarily touching or coming in contact with such lock.Somewhat below the center of the band 12 a hinge 14 is provided to whichis hinged a leaf 15 having at its end opposite the hinge 14 a resilientextremity 16 proportioned to pass over and engage under the bead 17 ofthe lock 10. In alinement with the keyhole 18 of the lock, the leaf 15is provided with a hinge 19 to which is hinged an auxiliary leaf 20which likewise has a resilient extremity 21 proportioned to engage underthe head 17 of the lock the same as the extremity 16, as plainly shownat Fig. 1. The leaf 20 carries a stud 22 proportioned and positioned topass into the keyhole 18 of the lock and to prevent the insertion of akey into such keyhole, as indicated in dotted lines at Fig. 2. The leaf15 carries a spring 23 resiliently engaging the offset 24 integral withthe leaf 20 so that when the stud 22 is removed from the keyhole thespring 23 will hold the leaf 20 resiliently away from such keyhole.

I claim 1. The combination with a rim lock, of a frame adapted to besecured adjacent the lock, a leaf hinged to the frame proportioned tofold over and engage the lock, and an auxiliary leaf hinged to saidfirst mentioned leaf proportioned to fold over and engage the lock, anda stud carried by the auxiliary leaf proportioned to occupy a portion ofthe keyhole of the lock.

2. The combination with a rim lock, of a frame proportioned to span thelock, a leaf hinged to the frame and proportioned to yieldingly engagethe side of the lock opposite the frame, an auxiliary leaf hinged to thefirst leaf and provided with a resilient end proportioned to engage theedge of the lock, and a stud carried by the auxiliary leaf proportionedto partly fill the keyhole of the lock.

3. As an article of manufacture, a frame piece, a leaf hinged to theside of the frame piece, a resilient offset at the end of the leaf, anauxiliary leaf hinged to the side of the leaf, a resilient offset fromthe auxiliary leaf, and a stud extending laterally from the auxiliaryleaf.

&. As an article of manufacture, a strap lock, and a stud outstandingfrom the last proportioned to span a lock and to be sementioned leafengaging said keyhole. 10 cured to'a door a leaf pivoted to one side ofIn testimony whereof I afiiX my signathe strap and extending laterallytherefrom, ture in presence of two Witnesses.

a second leaf pivoted to the side of the first FRANK MAURO. mentionedleaf and extending laterally Witnesses:

therefrom in substantial parallelism With CABLE l/VHITEHEAD,

the strap and covering the keyhole of said ALBERT L. VoGL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

